merge completed... now to fix all the bugs...

node_modules/eslint/lib/rules/no-empty-character-class.js

@@ -0,0 +1,55 @@
+/**
+ * @fileoverview Rule to flag the use of empty character classes in regular expressions
+ * @author Ian Christian Myers
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/*
+ * plain-English description of the following regexp:
+ * 0. `^` fix the match at the beginning of the string
+ * 1. `([^\\[]|\\.|\[([^\\\]]|\\.)+\])*`: regexp contents; 0 or more of the following
+ * 1.0. `[^\\[]`: any character that's not a `\` or a `[` (anything but escape sequences and character classes)
+ * 1.1. `\\.`: an escape sequence
+ * 1.2. `\[([^\\\]]|\\.)+\]`: a character class that isn't empty
+ * 2. `$`: fix the match at the end of the string
+ */
+const regex = /^([^\\[]|\\.|\[([^\\\]]|\\.)+\])*$/u;
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../shared/types').Rule} */
+module.exports = {
+    meta: {
+        type: "problem",
+
+        docs: {
+            description: "disallow empty character classes in regular expressions",
+            recommended: true,
+            url: "https://eslint.org/docs/rules/no-empty-character-class"
+        },
+
+        schema: [],
+
+        messages: {
+            unexpected: "Empty class."
+        }
+    },
+
+    create(context) {
+        return {
+            "Literal[regex]"(node) {
+                if (!regex.test(node.regex.pattern)) {
+                    context.report({ node, messageId: "unexpected" });
+                }
+            }
+        };
+
+    }
+};